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Pseudobagarius filifer (Ng & Rainboth, 2005)

Image contributors to this species:

Fishes of Mainland Southeast Asia (2)

ScotCat Sources:

Other Sources:

Relevant Information:

Description: Dorsal spines (total): 2; Dorsal soft rays (total): 4; Anal soft rays: 11; Vertebrae: 35. Extremely elongate first pectoral-fin element. Length of Caudal peduncle 23.0% SL. Elongate snout. Body sides with well-defined rows of enlarged elongate tubercles. Well-defined fold of skin where branchiostegal membranes meet. Habitat: This species is found in the main channels of large, turbid rivers with a moderate flow and sandy or muddy substrate. Etymology: The genus name Pseudobagarius: Tautonymous with Akysis pseudobagarius, proposed for members of the “pseudobagarius group” of Akysis; pseudo-, false, referring to striking (but phylogenetically false) resemblance to the sisorid genus Bagarius. The specific name filifer: filum, thread; fero, to bear, referring to the filamentous extensions of first pectoral-fin ray.

Common Name:

None

Synonyms:

Akysis filifer

Family:

Akysidae

Distribution:

Asia: Great Lake in Tonlé Sap drainage in Cambodia. Type locality: Cambodia: Kandal, Tonle Sap, fishing lot 8, 22 miles upstream from Phnom Penh, 11º44'N, 104º50'E.

Size:

5.0cm (2ins)

Temp:

22-27°C (71-81°F)

p.H.

6.0-7.5.

IUCN Red List

This species is known from blackwater habitats from the Terengganu River drainage southwards to the Sedili River drainage in Peninsular Malaysia, and Pulau Batam and Pulau Lingga in the Riau Archipelago. The estimated extent of occurrence (EOO) is estimated at 95,000 km2 and area of occupancy (AOO) is estimated to be between 1,900-2,000 km2. Based on the pervasive threat of peat swamp destruction due to land conversion, and given that this species is a peat swamp forest obligate, the number of locations is defined between one to five. Given a limited number of locations, a restricted AOO, and a major pervasive threat that has the potential to drive this species to extinction within a short time period, this species is assessed as Vulnerable (VU) under criteria D2 and B2ab(ii,iii,v), (IUCN 2019).

Reference:

Ferraris, C.J. Jr., 2007. Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types. Zootaxa 1418:1-628.
Ng, H.H. 2012. Pseudobagarius filifer. The IUCN Red List of Threatened Species 2012.
Ng, H.H. and W.J. Rainboth, 2005. Four new species of Akysis (Teleostei: Siluriformes: Akysidae) from mainland Southeast Asia, with comments on A. similis. Raffles Bull. Zool. Supplement (13):33-42.
The ETYFish Project Fish Name Etymology Database © Christopher Scharpf.

Family: Akysidae Back to Ident-A-Cat Click on Thumbnails

Pseudobagarius filifer

Pseudobagarius filifer
Dorsal view-showing the extended first pectoral-spine

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